I had a chance to discuss
with Glenn, Sam and
Bob the benefits of using the MS-PL for this library first
over twitter and then over email.

Representing .NET's loyal competitor, I did not think that
we stood a chance of getting Microsoft to change the license,
but I was pleasantly surprised. Glenn understood the value of
open source, Sam wanted to do the right thing about this
library and CodePlex and Bob argued that Mono already had
Mono.Addins anyways.